Commensal
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Related Articles from SNS
Rational engineering of facultative anaerobiosis enables commensal survival in the oxygenated gut
Life originated in the absence of oxygen. Despite its substantial energetic advantages, many modern microbes remain obligate anaerobes, confined to anoxic niches such as the mammalian gut. Why these organisms cannot tolerate oxygen has remained unresolved for more than two centuries.
Commensal-derived acetylcholine enhances mucosal immune education
Nature, Published online: 03 June 2026; doi:10.1038/s41586-026-10592-7A diet–microbiome–host axis strengthens mucosal immune defences and reinforces host–microbiota mutualism.
Complex adaptive architectures constrain the pace of adaptations sweeping across human gut microbiomes
Recent work has shown that commensal gut bacteria can evolve rapidly within hosts on short timescales of days to months, fueled by the enormous mutational input generated daily in the microbiome. Yet how rapidly adaptations spread across gut microbiomes of different hosts remains unclear. We address this question by estimating the number of independent origins of gene-specific sweeps spreading via recombination across bacterial populations.
A membrane-anchored inhibitor of papain-like cysteine proteases promotes Pseudomonas root colonization
Pseudomonas species, spanning both beneficial and pathogenic lifestyles, possess conserved mechanisms to modulate plant immunity. Nevertheless, the mechanisms by which commensal bacteria establish and maintain host colonization remain poorly understood. Here, we report the characterization of a Pseudomonas chagasin-like protease inhibitor (Cpi1), conserved across pseudomonads representing a novel class of membrane-anchored PLCP inhibitor.
Microbial community profiles of the snake cloaca in the presence and absence of Chlamydiota
Chlamydiota are obligate intracellular bacteria detected in snake cloacal microbiota, yet their biological significance remains poorly understood. Members range from recognised pathogens, such as Chlamydia serpentis, to potential environmental symbionts, raising questions about whether they represent transient contaminants, persistent colonisers, or subclinical infectious agents. Despite the cloaca serving as a primary site of chlamydial shedding in snakes, its interaction with the broader...